James Bayrer
Assistant Professor
+1 415 502-2352
+1 415 476-1343

Biography

As a pediatric gastroenterologist and physician scientist, I am keenly aware of the challenges faced by our pediatric population. The intestinal epithelium comprises the human body’s greatest environmentally exposed surface and is the largest sensory and endocrine organ. My research utilizes human intestinal organoids and animal models to understand how the intestine senses and responds to both regular and inflammatory stimuli. By investigating the molecular pathways involved, we aim to discover new ways to promote intestinal wound healing and modulate the signals contributing to visceral pain syndromes.

Education and Training

M.D., 2007 School of Medicine, Case Western Reserve University
Ph.D., 2005 Pharmacology, Case Western Reserve University

Publications

Pervinder K. Choksi, Holly A. Ingraham, James Bayrer. 948 – Nuclear Receptor Liver Receptor Homolog-1 Promotes Intestinal Notch Signaling and Enteroendocrine Cell Development. Gastroenterology. 2019 May 1; 156(6):s-202.
Herber CB, Krause WC, Wang L, Bayrer JR, Li A, Schmitz M, Fields A, Ford B, Zhang Z, Reid MS, Nomura DK, Nissenson RA, Correa SM, Ingraham HA. Estrogen signaling in arcuate Kiss1 neurons suppresses a sex-dependent female circuit promoting dense strong bones. Nat Commun. 2019 01 11; 10(1):163.
Kulkarni S, Ganz J, Bayrer J, Becker L, Bogunovic M, Rao M. Advances in Enteric Neurobiology: The "Brain" in the Gut in Health and Disease. J Neurosci. 2018 10 31; 38(44):9346-9354.
Bayrer JR, Wang H, Nattiv R, Suzawa M, Escusa HS, Fletterick RJ, Klein OD, Moore DD, Ingraham HA. LRH-1 mitigates intestinal inflammatory disease by maintaining epithelial homeostasis and cell survival. Nat Commun. 2018 10 10; 9(1):4055.
James Bayrer, Hazel Escusa, Ophir D. Kein, Holly Ingraham. 273 - Nuclear Receptor LRH-1 Mitigates Intestinal Inflammatory Disease by Promoting Stem Cell Survival and Directing Normal Epithelial Composition. Gastroenterology. 2018 May 1; 154(6):s-67.
Bellono NW, Bayrer JR, Leitch DB, Castro J, Zhang C, O'Donnell TA, Brierley SM, Ingraham HA, Julius D. Enterochromaffin Cells Are Gut Chemosensors that Couple to Sensory Neural Pathways. Cell. 2017 Jun 29; 170(1):185-198.e16.
Wallach TE, Bayrer JR. Intestinal Organoids: New Frontiers in the Study of Intestinal Disease and Physiology. J Pediatr Gastroenterol Nutr. 2017 02; 64(2):180-185.
James R. Bayrer, Robert Fletterick, Holly Ingraham. Tu1824 Targeting Intestinal Stem Cells to Promote Healing in Inflammatory Bowel Disease. Gastroenterology. 2015 Apr 1; 148(4):s-911-s-912.
Bayrer JR, Mukkamala S, Sablin EP, Webb P, Fletterick RJ. Silencing LRH-1 in colon cancer cell lines impairs proliferation and alters gene expression programs. Proc Natl Acad Sci U S A. 2015 Feb 24; 112(8):2467-72.
James R. Bayrer, Sridevi Mukkamala, Elena Sablin, Robert Fletterick. Sa1803 Dissecting the Oncogenic Activity of the Nuclear Receptor LRH-1 in the Colon. Gastroenterology. 2014 May 1; 146(5):s-299.
Yang Y, Zhang W, Bayrer JR, Weiss MA. Doublesex and the regulation of sexual dimorphism in Drosophila melanogaster: structure, function, and mutagenesis of a female-specific domain. J Biol Chem. 2008 Mar 14; 283(11):7280-92.
Bayrer JR, Zhang W, Weiss MA. Dimerization of doublesex is mediated by a cryptic ubiquitin-associated domain fold: implications for sex-specific gene regulation. J Biol Chem. 2005 Sep 23; 280(38):32989-96.
Bayrer J, Wan Z, Li B, Weiss MA. Expression, crystallization and preliminary X-ray characterization of the Drosophila transcription factor Doublesex. Acta Crystallogr D Biol Crystallogr. 2004 Jul; 60(Pt 7):1328-30.